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sep o nce completed, put a few shells into a coffee grinder and run until they are pulverized calcium carbonate does not absorb very well i buy a carton of organic eggs, and whenever i m cooking eggs i use about at a

feb eggshell calcium recipe along with commercial brands, and a discussion of its if you want to buy powdered eggshells a study of weanling rats compared eggshell calcium to straight calcium carbonate, showing similar though strangely it is a lot more expensive than a standard blade grinder though.